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TI-2026-42697 Aliases CVE-2026-59883GHSA-g446-98w2-8p5w

Guzzle: Cookie Disclosure and Injection via IP-Address Domains

Priority LOW 26CWE-346Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass, Spoofing, Information disclosure
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-346, CWE-384 and CWE-200.

Summary

Guzzle is an extensible PHP HTTP client. Prior to 7.12.3, CookieJar did not restrict cookies scoped to IP-address or bare-numeric Domain values to the exact host that set them, because SetCookie::matchesDomain() applied ordinary suffix matching to domains such as 192.168.0.1, [::1], or 1, allowing cross-host cookie disclosure, cookie injection, or session fixation. This issue is fixed in version 7.12.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 6th percentileScored 2026-11-07
Fix Fixed guzzle (guzzle): 7.12.3guzzlehttp/guzzle (Packagist): 7.12.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
guzzleguzzlebefore 7.12.37.12.3Patch availableCNA
—guzzlehttp/guzzle (Packagist)before 7.12.37.12.3Patch availableGHSA-g446-98w2-8p5w
  • guzzle Vendorguzzle Affected before 7.12.3 Fixed in 7.12.3 Patch available CNA
  • guzzlehttp/guzzle (Packagist) Vendor— Affected before 7.12.3 Fixed in 7.12.3 Patch available GHSA-g446-98w2-8p5w

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:guzzlephp:guzzle:*:*:*:*:*:*:*:*before 7.12.3Vulnerableguzzle
  • cpe:2.3:a:guzzlephp:guzzle:*:*:*:*:*:*:*:* Versions before 7.12.3 Vulnerable ·guzzle

Remediation

  • Fix · CNA guzzle (guzzle) Fixed in 7.12.3
  • Fix · GHSA-g446-98w2-8p5w guzzlehttp/guzzle (Packagist) Fixed in 7.12.3 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59883
  2. 2026-10-03 Alias added: GHSA-g446-98w2-8p5w

References

Patch 2

Advisory 2

Other 2

  • TI-2022-13088 Fix failure to strip Authorization header on HTTP downgrade in Guzzle CVSS 3.1HIGH 7.5
  • TI-2022-13087 Failure to strip the Cookie header on change in host or HTTP downgrade in Guzzle CVSS 3.1HIGH 7.5
  • TI-2022-11789 Cross-domain cookie leakage in Guzzle CVSS 3.1HIGH 8.1
  • TI-2022-13135 Change in port should be considered a change in origin in Guzzle CVSS 3.1HIGH 7.7
  • TI-2022-13134 CURLOPT_HTTPAUTH option not cleared on change of origin in Guzzle CVSS 3.1HIGH 7.7
  • TI-2026-40256 Guzzle: Dot-Only Cookie Domains Match All Hosts in guzzlehttp/guzzle CVSS 3.1MEDIUM 5.8
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences